05-15-2014, 05:06 PM
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Join Date: Dec 2013
| | Re: Stone work question of a different sort
Originally Posted by fdn1
I plan to face my typical Pompeii oven design in a Beehive (equilateral Gothic arch) shape similar to what Patrick of Ireland has done.
Unfortunately I do not have access to flat stone and must make due with the 'roundish" type glacial till boulders available to me. A dry construction seems out of the question so I am planning on using a wet mortar construction.
Question 1: I am looking for a material that is waterproof, pliable and can take the temperature reached on the outside of the vermiculite/cement insulating layer over the dome. The intent is to prevent any rain water or snow melt that might eventually find its way through the fieldstone from reaching the vermiculite/cement insulating layer. One possibility suggested is the rubber membrane material that is used on flat roofs. (I have yet to check its heat resistant characteristics)
Question 2: What is the best way to lay the rounded field stone to the correct shape without resting them directly on the vermiculite/cement layer. One suggestion was to first cement cinder blocks in a "staircase fashion" over but not touching the dome. The fieldstone would then be cemented to the cinder blocks.
Any comments on the suitability of the above or suggestions for other approaches would be most appreciated.
Hoping you visit the site once in a while. Did you use any water proofing material behind your stone? Did you measure heat outside the dome walls?